1. Trends in Microbiology
Erratum: Directly transmitted viral diseases: modeling the dynamics of transmission 
Trends in Microbiology 
Volume 16, Issue 6, (June 2008)
DOI: /j.tim
Copyright © 2008 Elsevier Ltd Terms and Conditions

2. Figure 2
Flow diagrams of viral transmission mathematical models. Each parameter, shown as a Greek letter next to an arrow, defines the rate of movement from one class to the next. μ, birth and death rates; β, transmission coefficient; σ, rate at which infected individuals become infectious; γ, rate at which infectious individuals lose their ability to transmit; ρ, rate of loss of immunity. (a) A schematic of the SEIR model for acute (see Figure 1a) and chronic infections (see Figure 1b) in a homogeneous population with no loss of immunity. (b) The carrier model with a variable infectious period (see Figure 1c). One percent of the population leaves the infectious class at rate γ2, and the other 99% leave at rate γ1. (c) A diagram of the SEIRS model (see Figure 1d). The long arrow from the recovered class to the susceptible class indicates individuals who have recovered from an infection and lose their acquired immunity at rate ρ.
Trends in Microbiology  , DOI: ( /j.tim )
Copyright © 2008 Elsevier Ltd Terms and Conditions